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Vital Signs

Perspectives on Healthcare IT, clinical informatics, emerging technology, and life at the intersection of nursing and enterprise systems.

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November 1, 2026 · Certification Prep, Healthcare IT, HIMSS Word of The Day, Interoperability and Standards

HIMSS Word of the Day #324: HISP (Health Information Service Provider)

A HISP, or health information service provider, is the Direct Project’s term for both a function, managing security and transport for directed exchange, and an organization that performs that function for senders and receivers. This post explains what a HISP does behind a Direct address, why a HISP can be a HIPAA business associate, what the regulation says about Direct in certified EHRs, and how directory management and growth statistics from the literature show the importance of this layer.

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